| Write LiveCode script named "Find Prime" to find prime numbers up to the number to be specified. | 
  
  | Here is a complete LiveCode script named Find Prime that finds all prime numbers up to a number specified by the user. | 
  Script: Find Prime (LiveCode) | 
  | 
command FindPrime
   put field "Input" into tMax
   put "" into field "Output"
   if not isNumber(tMax) or tMax < 2 then
      answer "Please enter a whole number greater than or equal to 2."
      exit FindPrime
   end if
   repeat with n = 2 to tMax
      if isPrime(n) then
         put n & return after field "Output"
      end if
   end repeat
end FindPrime
function isPrime p
   if p = 2 then return true
   if p mod 2 = 0 then return false
   repeat with i = 3 to sqrt(p) step 2
      if p mod i = 0 then return false
   end repeat
   return true
end isPrime
   | 
  | How to Use This in a LiveCode Stack 
  Create a text field and name it "Input" (this is where the user enters the maximum number).
  Create another field named "Output" (this will display the prime numbers).
  Create a button and in its mouseUp handler, insert this:
   | 
  | 
on mouseUp
   FindPrime
end mouseUp
   |